138193030 has 32 divisors (see below), whose sum is σ = 252396000. Its totient is φ = 54473472.

The previous prime is 138192953. The next prime is 138193057. The reversal of 138193030 is 30391831.

It is a self number, because there is not a number n which added to its sum of digits gives 138193030.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242586 + ... + 243154.

It is an arithmetic number, because the mean of its divisors is an integer number (7887375).

Almost surely, 2^138193030 is an apocalyptic number.

138193030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138193030 is a deficient number, since it is larger than the sum of its proper divisors (114202970).

138193030 is a wasteful number, since it uses less digits than its factorization.

138193030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 138193030 is about 11755.5531558494. The cubic root of 138193030 is about 517.0057577486.

The spelling of 138193030 in words is "one hundred thirty-eight million, one hundred ninety-three thousand, thirty".